21 lines
910 B
SQL
21 lines
910 B
SQL
-- 004_event_triggers.sql — event-driven schedule triggers.
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--
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-- Until now schedules only supported cron. This migration adds:
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-- * trigger_kind = 'event' schedules, powered by a CEL expression over
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-- the event bus. Example: players_online == 0
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-- * optional sustained-state: fire only after the condition has been
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-- continuously true for N seconds. Enables "idle shutdown if 0 players
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-- for 30m" without firing every 60s when the polled player count is 0.
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--
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-- cron_spec becomes nullable so event triggers can exist with NULL there.
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-- Exactly one of cron_spec / event_spec is populated; the application
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-- enforces this.
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ALTER TABLE schedules ALTER COLUMN cron_spec DROP NOT NULL;
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ALTER TABLE schedules
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ADD COLUMN event_spec TEXT,
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ADD COLUMN event_sustained_seconds INTEGER NOT NULL DEFAULT 0;
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CREATE INDEX idx_schedules_trigger_kind ON schedules(trigger_kind);
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